What Causes the Corolla's Locking Horn Not to Sound?
2 Answers
Corolla's locking horn not sounding is usually caused by the vehicle not being locked or the anti-theft system's battery running out. Here are the relevant details: Reasons why the locking horn does not sound: The vehicle is not locked, and the anti-theft system will only work after locking; the movement is slight, and lightly touching the vehicle will not activate the anti-theft system; the anti-theft system's battery is depleted, and replacing the power source will solve the issue; the anti-theft system is damaged, such as a short circuit in the circuit, and requires repair at a service center. Activating the locking horn: Locking and unlocking are divided into hazard light indicator and horn modes. By simultaneously pressing the lock (LOCK) and unlock (UNLOCK) buttons on the smart key for more than 2.5 seconds, the hazard light will flash once, and the horn will sound once, indicating that the horn mode has been activated.
I once encountered a situation where the Corolla's horn didn't sound when locking the car. That day, I was in a hurry to get to work and found no sound when pressing the key, which really panicked me. Later, I realized it might be a setting issue—some owners accidentally turn off the alarm sound in the menu, and it needs to be reactivated in the system. Alternatively, the horn fuse might have blown; the Corolla's fuse box is located under the driver's seat, and replacing the corresponding fuse should fix it. Weak key battery power can also cause a weak signal, and replacing it with a new battery often works. I've also heard that if the car door or hood isn't fully closed, causing the system to misjudge, the horn may fail. Though it's a small issue, it's related to safety. I recommend regularly checking the car key and settings, testing it a few times to ensure everything works, avoiding accidents when parking. In short, don’t panic—start with simple troubleshooting steps, and if that doesn’t work, take it to a professional shop.
